What is the water quality grade for Lake Darling?

Lake Darling in Renville County, North Dakota received a water quality grade of C (Fair). Water clarity: 5.4 ft visibility. Chlorophyll-a (algae): 10.7 µg/L. Maximum depth: 28.7 ft. Surface area: 9432.4 acres.

Is Lake Darling safe to swim in?

Generally safe for swimming, moderate water quality. Lake Darling has an overall water quality grade of C. Algae concentration (chlorophyll-a) is 10.7 µg/L. Always check local health department advisories before swimming.

How deep is Lake Darling?

Lake Darling has a maximum depth of 28.7 feet and an average depth of 12 feet. The lake covers 9432.4 acres.

What fish are in Lake Darling?

Fish species found in Lake Darling include Northern Pike, Walleye, Yellow Perch, Smallmouth Bass. Lake Darling is located in Renville County, North Dakota.

Renville County, North Dakota

Lake Darling

Grade CFair · 5.4 ft clarity

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Eutrophic

Lake Darling is a 9,432-acre productive, nutrient-rich eutrophic lake in Renville County, North Dakota with a maximum depth of 29 feet (12-foot average). Water quality is graded C based on 2 sampling years through 2021. The lake supports 4 documented fish species including Northern Pike, Walleye, and Yellow Perch. Public access is available with 1 public boat landing. Compared to the 2 other monitored lakes in Renville County, Lake Darling ranks #3 for water quality.

Source: EPA Water Quality Portal sampling records, North Dakota DNR, last sampled 2021-08-05. Grade methodology: LakeGrade methodology.

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Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 5.4 ft. Chlorophyll-a: 10.7 µg/L. Trophic State Index: 53.

Metric	Value	Grade
Water Clarity (Secchi Depth)	5.4 ft	D
Phosphorus	No data
Chlorophyll-a (Algae)	10.7 µg/L	C
Trophic State Index (TSI)	53	Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

Characteristic	Value
Maximum Depth	28.7 ft
Average Depth	12 ft
Surface Area	9,432 acres
Shoreline Length	73.1 mi
Public Access	Yes

Where to stay near Lake Darling

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Fish Species

Northern Pike Walleye Yellow Perch Smallmouth Bass

Click a species to see every graded lake where it is documented.

Fishing Lake Darling

Recreation & Access

Boat Landings

Yes

Public Access

Water Temperature

Lake Darling averages about 45°F at the surface in summer, usually warmest in Jul (about 47°F) and coldest in Sep (about 40°F). These are typical values by month — not a live reading.